The Portuguese Man O' War, also known as the Blue Bottle, is one of the most venomous creatures on earth. With its relatively small air bladder it floats on the surface of the ocean dragging its long tentacles through the water hunting for prey. Little fish touching these almost invisible yarns are paralysed immediately and can be digested by the jellyfish. Their sting is also potentially dangerous to humans; they have been responsible for several fatalities, but usually only cause intense pain. On the other hand this creature has been a great source of inspiration for humanity. The shape of sails for ships has actually been derived from this jellyfish’s air bladder which incorporates an erectable sail.
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